<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Title</title>
</head>
<body>
<script>
	let print1 = function (obj) {
		console.log(obj);
	}
	print1('abc');
	//简写为：
	let print2 = obj => console.log(obj);
	print2('abc');
	let sum1 = function (a, b) {
		return a + b;
	}
	let sum2 = (a, b) => {
		return a + b;
	}
	let sum3 = (a, b) => a + b;
	console.log(sum3(3,5));

	let person = {
		name: 'jack',
		eat1: function (food) {
			console.log(this.name + '正在吃' + food);
		},
		eat2: food => console.log(person.name + '正在吃' + food),
		eat3(food) {
			console.log(this.name + '正在吃' + food);
		}
	}

	person.eat2('apple');
	person.eat3('xxx');


</script>
</body>
</html>